linux-kernel - Re: [PATCH] Uninline fork.c/exit.c

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Message-ID: <20071002064055.GA6144@localhost.sw.ru>
Date:	Tue, 2 Oct 2007 10:40:55 +0400
From:	Alexey Dobriyan <adobriyan@...ru>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	akpm@...l.org, linux-kernel@...r.kernel.org, devel@...nvz.org
Subject: Re: [PATCH] Uninline fork.c/exit.c

On Mon, Oct 01, 2007 at 11:08:14AM -0700, Arjan van de Ven wrote:
> On Mon, 1 Oct 2007 16:15:53 +0400
> Alexey Dobriyan <adobriyan@...ru> wrote:
> 
> > Save ~650 bytes here.
> > 
> > add/remove: 4/0 grow/shrink: 0/7 up/down: 430/-1088 (-658)
> > function                                     old     new   delta
> > __copy_fs_struct                               -     202    +202
> > __put_fs_struct                                -     112    +112
> > __exit_fs                                      -      58     +58
> > __exit_files                                   -      58     +58
> > exit_files                                    58       2     -56
> > put_fs_struct                                112       5    -107
> > exit_fs                                      161       2    -159
> > sys_unshare                                  774     590    -184
> > copy_process                                4031    3840    -191
> > do_exit                                     1791    1597    -194
> > copy_fs_struct                               202       5    -197
> > 
> > No difference in lmbench lat_proc tests on 2-way Opteron 246.
> > Smaaaal degradation on UP P4 (within errors).
> > 
> 
> is there any impact on stack usage?

No differences in checkstack output which threshold is 100 bytes.

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